Typewriting machine



June 2, 1931. H. A. Avr-:RY

TYPEWRITING MACHINE 6 Sheets-Sheet 1 Filed April 25, 1928 Nn N wwwATTORNEYS June 2, 1931. H. A. AVERY TYPEWRITING MAcHmE Filed April 23,1928 6 Sheets-Sheet 2 @000mm 00 @o INVENTOR H6219/ Alle Amy ATTORNEYSJune-2,1931. H, A, AVERY 1,808,739

TYPEWRITING MACHINE Filed April` 23. 1928 6 Sheets-Sheet .'5

INVENTOR H6279/ Allen Avey- A 9 ABY.

ATTORNEYS June 2, 1931.

H. A. AVERY TYPEWRITING MACHINE Filed Ap-ril 25, 1928 6 Sheets-Sheet 4FLL?. 145

mvENToR Heng/Allen Aver]- BY ATTORNEYS June 2, 1931. H. A. AVERY1,803,739

' TYPEWRIT'ING mouw:

Filed April 23, 1928 s sheets-sheet 5 June 2, 1931.

H, A. AVERY TYPEWRITIANG MACHINE Filed April 23, 1928 6 Sheets-Sheet 6www VM 4f my Z Zw B 1. .J ,W

ATTORNEYS Patented June 2, 1931 UNITED STATES PATENT-lorries mY AVERY, FGMTON, NEW YORK, ASSIGNOB T0 L G i MEDIA.

TYPEWEITEBS INC., 0F SYBACUSE, NEW YORK, A. OORPORATIOI 0l' m YOB-I`TYPEWBILTIN'G IACHINE Application led April 28,

ble writing typewriting machine.

One feature of the invention is the provision of asimple and eflicientribbon vibrating mechanism settable to impart two different extents ofthrow to a bichrome ribbon and to render the mechanism ineffective tovibrate the ribbon.

Another feature of the invention is the provision of effective means forpreventing accidental overthrow of the ribbon, when using having acase-shifting platen carriage, saideither zone of the ribbon, inconnection with vibrating mechanism for imparting two different extentsof throw to a bichrome ribbon.

Further features of lthe invention are the provision of a compact andetlicient type-baractuated mechanism for vibrating a ribbon guid tocover the printing point with either zone of a bichrome ribbon; and theprovision of a type-bar-actuated ribbon vibrating mechanism especiallyadapted for use in a small and flat portable typewriting machinemechanism being so constructed and arranged that the vibratory ribbonguide will shift bodily with lthe platen and have a uniform throw foreach color zone of abichrome ribbon whether the platen be in upper orlower case position. Other features and advantages will appear from thefollowing description.

Parts of the improvements may be used without the others, and variationsmay be resorted to within the scope of the inventionas defined by theclaims.

In the accompanying drawings:

Fig. 1 is a longitudinal sectional view of the machine, many of theparts bein omitted .to show more clearly the case shi mechanism, thebichrome shift and stencil adjust- Y ment mechanism for the ribbonvibrating means, and the mountings for certain parts.

of the ribbon mechanism;

Fig. 2 a detail sectional view showing the mounting of the rotaryescapement devices and associated parts of the ribbon mechanism;

1988. Serial lo. 272,121.

Figs: 3, 4, 5 and 6 detail perspective views of v arious parts oftheribbon mechanism; Fig. 7 a rear view of the machine cocked 1 up to aposition in which the type bar seg'- ment is 1n a vertical pla'ne andthe carriage bed 1n a horizontal plane, the rear part of the main framebeing broken away and the vibrator control means being set in stencil Yposltion Fig. 8 a fragmentary bottom view of the machine positioned asin Fig. 7;

Fig. 9.a perspective view showin 'part of' the case shift frame, andalso showing those portlons of the ribbon vibrating means and itsadJusting means which are mounted on the shlft frame, together with theelements connected directly therewith;

10, 11 and 12 detail side elevations o f s1milar portions of the ribbonvibrating means showing the positions thereof at the end of theVimpression stroke of a type bar 1n each of the three adjustments of thebichrome shift and stencil control means;

Fig. 13 a fragmentary view of the machine, on an enlarged scale, lookingfrom the left hand side of the machine, parts of the machine beingbroken away to show the ribbon vibrating means in side elevation;

Flg. 14 a fragmentary bottom plan view of the machine, on an enlargedscale, showing the ribbon vibrating means in normal position and set forcovering the printing oint with the upper zone of the ribbon, as 1n Fig.13, theview being taken with the machine cocked as in Figs. 7 and 8;

Fig. 15 a front view of the ribbon vibrating means, set for use of theupper zone of the ribbon as in Figs. 13 and 14, the front arcuateportion of the universal bar being broken away, and the view being takenwith the machine cocked as in Figs. 7 and 8;

Fig. 16 a section on the line 16--16 of Fig.

15, with parts of the escapement and fixed means being shown in normalposition, an

adjustedifor vibrating the upper zone of the ribbon to theprintingpoint; and

Fig. 18 a view similar to Fig. 17 showing n the positions of the variousparts at the en .of the printing stroke of a type bar.

located in the rear portion of the mainframe with its lower edge abovethe level of the lower edges of the other frame walls and 1nclinesupward and rearward. A rearwardly inclined type-bar segment 14, havingan arcuate recess 15 in its rear face, is held to the front face of wall13 by suitable screws, with the usual arcuate pivot wire 16 thereinlying in a plane parallel with said wall. An arcuate system of type bars17 are-fulcrumed on wire 16 and guided in the segment slots to strike onthe upper front quarter of a platen 18. Character key levers 19 arefulcrumed at their rear ends on a pivot wire 20 held to a fulcrum plateA21 secured to the rear face of wall 13 by suitable fastening screws. Thekey levers extend downward behind wall 13 and then forward under saidwall to the keyboard and are guided in a comb member 22 held to the mainframe. The connection between each key lever Aand its associated typebar comprises a bell-crank lever 23 fulcrumed in a sub-lever segment 24and connected with the type bar heel and key lever by links 25 and 26,respectively. Return spring 167 for the type bar actions connect keylevers 19 with a spring anchor bar 166 on the main frame, hereinafterreferred to.

, -The shift frame for the platen carriage 27 comprises a rearwardly anddownwardly in-A clined carriage bed 28 having a pair of rigid downwardlyand forwardly extending sheet metal guide members 29 fastened thereto attheir upper ends adjacent opposite sides of the machine and connected bya transverse brace rod 30 adjacent their lower ends. The carriage ismounted on the bedin rearwardly tilted position on suitable antifrictionbearings, as shown, to travel transversely of the machine, and supportsin rear of the type bar plvots. The carriage and bed overlie the spacetween frame walls 11 and 13 and the guide members 29 extend down betweensaid walls between cooperating guide members 31 held to the main frameside walls in upwardly and rearwardplaten 18 above and lyinclinedposition, members 29 and 31 bef ing provided with races in whichare confined ball bearings, said members and races being so\ arranged asto ide the carriage `and' shift frame obliquely 1n a plane parallelnalled on the frame walls 12 between wall 11 and the lower part of theshift frame, and studs 34 are engaged in rearwardly and downwardlyextending slots 37 in members 29 of the shift frame. Brackets 39 alsosupport a type bar rest 40.

Downward movement of the shift frame is limited by engagement of stops41 on members 29 with adjustable stop screws 42 on brackets 43 held toframe walls 12. Upward movement of the shift frame is limited by theengagement of adjustable ,sto screws 44 on members 29 with stops 45 onrackets 43. -The frame 35-36 is arranged to counterbalance the shiftframe by connecting lugs 46 on arms 35 with the lower ends ofcounterbalancing springs 47 which are secured at their upper ends toarms 48 of brackets 43.

An arcuate sheet metal universal bar 49, adapted to be engaged and movedrearwardly by lugs 17 on the type bars during the latter part of theprinting strokes of the type bars,

is located between segment 14 and wall 13 and 1s supported in a planeparallel with the planes of said wall and segment to vibrate in thesegment recess 15 in a path substantially perpendicular to said planesand the rearwardly inclined plane in which the type bar plvot wire 16 inthe segment lies. Universal bar 49 is carried at the forward ends of apair of rearwardly and downwardly extending two-part sheet metal sidearms comprising front sections 50 and 51 and rear sections 50* and 51.Sections 50 and 51 are formed mtegrally with the universal bar, asshown, and extend through apertures 52 afordmg clearance openingsthrough wall 13 and fulcrum plate 21. The front portions of sections 50nand 51* are rigidly but detachably clamped to the rear portions ofsections 50 and 51 by pairs of screws 54.

Sections 50l and 51 of the side arms are offset laterally inward at therear ends of sections 50 and 51 and are provided with longitudinalguiding and supportin slots 53 in their offset rear portions exten 'ng-perpendicular to the plane of the se ent. These slots are open at theirrear en s and correspond in width, .with the diameter of rock shaft 36which Aextends therethrough and upon which the side arms are thusslidably supported and guided at their rear ends to reciprocatefore-and-aft of the machine. A transverse spacer bar 55 formedintegrally with section/.50* forward of sha-ft 36 abuts the inner faceof section 51.

The side arms extend from universal'bar 49 through the shift frameandtheshift torsion frame to oints adjacent the lower edge of wall 11, and)are supported and guided intermediate the universal bar and shaft 36 onfore-and-aft rocking arms 56 and 57, fixed at their lower ends on ashort transverse rock shaft 58. Shaft 58 has trunnions 58a journalled onthe inner ends of' bearing screws 59 threaded inward through the rearends of a pair of arms 21'L which are formed integrally with fulcrummember 21 Vand extend rearward and downward to a point forward of shiftframe rod 30 and close to the base line of the main frame. Arms 56 and57 extend upward and rearwardlyforward of shift frame rod 30 at aslightly less angle from the.

vertical than the wall 13 and shift frame and have pivotr holes in theirends in vwhich are engaged reduced pivot portions of pivot and spacingstuds 61 and 64, the reduced outer supporting ends of the studs beingswaged tightly in apertures in the arm sections 50 and 51, respectively,forward of arm sections 50n and 51a. Stud 64 has a reduced and headedextension 64 extending inward from its pivot portions for supporting andguiding a part of the ribbon vibrating mechanism.

The universal bar is normally held at the forward limitfof its Imovementagainstvthe front wall of recess -15 in the type bar segment 14 by areturn spring, hereinafter described, and its extent of vthrow byuniversal bar contacting lugs 17 on the type bars 17 is such that thepivot studs 61 and 64 and upper ends of rock arms 56 and 57 swingbetween points substantially equal distances at opposite sides of aplane through the axis of rock shaft 58 perpendicular to the plane ofthecarriage bed and parallel with wall 13. The arrangement and movement ofrock arms 56 and 57, together with the arrangement of slots 53longitudinally of the side arms and perpendicular to the plane of wall13, provides for supporting and guiding the universal bar 49 to vibrateobliquely to the horizontal plane of the machine in a path substantiallyperpendicular to the plane of the segment and its type bar pivot wire.

The escapement and line-locking mechanism are constructed as in theCorona Four machine, with the exceptions hereinafter pointed out, andneed oIl/yl be so far described as to permit a full understanding of thepresent invention. A sheet metal bracket 65 has its fiat body part heldby screws 66 against the bottom face of carriage bed 28 and extendingacross an openin 85 in said bed. A-

steel bushing 67 exten s through, and.I is

'tightly swaged in, an opening in said body in bearing apertures inpendent pivot ears 72 and 73 formed at the ends of the flat body part ofa sheet metal dog rocker 74. A rigid holding dog 75, formed on theforward edge of rocker 74, and a feeding dog 76 (pivoted on the rockerat 77 and controlled by a suitable spring and stop device), cooperatewith a toothed escapement wheel 78 to control the feed of the carriage.Wheel'78 in the present construction is 'formed with a pendent hub 78aand is fixed on the lower end of a shaft 79 journalled in bushing 67 andcarrying a feed pinion 80 at its upper end meshling with a rack 81. Rack81 lies between the lcarriage base plate and carriage bed and is formedintegrally with a portion of the carriage base plate as in the Coronamachine. The carriage 27 is normally urged toward the left by the usualspring drum 82 which is held to the carriage bed at 83'and is connectedin the usual way by a suitable cable with the carriage. .Pinion l80 isadapted to pass through opening 85 in the bed 28, so that bracket 65together with the parts mounted thereon is-removable from and attachableto the bed as a unitary assemblage.

In the present construction the escapement shaft is prolonged downwardto a point above the level of the universal bar side arms and is formedwith a circumferential groove 86 closely adjacent its lower end in whichis engaged a bendable horseshoe shaped key 87 between which and thelower end of the escapement wheel hub is confined the main body part ofa lever forming part of the ribbon vibrating means, which lever ashereinafter described is pivotally supported on the shaft 79 and the hub78n of the escapement whel 78.

In the presentconstruction also the prolonged portion of the shaft belowthe bushing is formed with longitudinal grooves 88 into which are firmlyscrewed the inner end of set screws 89, threaded through the hub of theescapement wheel, for holding the wheel to the shaft. The outer ends ofscrews 89 are countersunk within the periphery of the hub 7 8a which isfree lfrom other projections and is cylindrical.

' Dog rocker pivot ear 73-is formed with a forwardly extending stop arm90 formed with an upstanding rearwardly facing hook lug 90 the upper endof which normally 6 abuts the bottom face of bracket 65 adjacent theinner side of bracket arm 69 to arrest return movement of dog rocker 74under the vpull of the rocker return spring'91. Spring 91 is connectedat its rear end with a lug 92 projecting laterally outward from thelower end of rocker pivot ear 72 and is connected at its forward endwith a pendent lug 93 on bracket arm 68. The feeding dog 76 normallyengages a tooth of the escapement wheel 78 with holding dog 75 above theplane of the wheel. The rocker is provided with an arm 94depending fromits pivot ear 73 and formed with an outwardly extending contact lugv 95at its lower end lying latwise 20 in a plane perpendicular to wall 13and the path of movement of the shift frame. The rocker is adapted to berocked through the medium of said arm 94 and lug 95, to disengage dog 76and engage dog 75 with escapement wheel 78, by tappets 96 and 97movable, respectively, with the type-bar-actuated universalbar 49, and aspace bar (not shown), said tappets being located forward of lug 95 withtheir rear lug-contacting edges parallel with the path of shift of theshift frame.

Tappet 96 is rigid with and formed on the rear end of side arm 50 of theuniversal bar and, in the machine shown, is normally spaced slightlyforward of lug7 5. Tappet 97 is formed on the rear end of a bar 98, andis normally substantially engaged by lug 95, as slfown. The bar 98 isguided to move rearward and downward upon depressions of the space bar,being provided with a downwardly inclined guide slot 99 in which engagesa stud 100 projecting outward from rock arm 56, as in the machinehereinbefore referred to.

A plate 101 formed of sheet metal is held to the carriage bed 28 byscrews102 and 103 45 passing through a forwardly extending base flangeformed on said plate and underlying the bed. Plate 101 extends up behindthe rear raceway of the carriage where it is formed with a carriage stoplug 113".

A right hand mar in stop 104 is mounted on the margin stop ar 105carried by the platen carriage and is adjustable along said bar as inthe Corona machines. Stop 104 is formed with a pendent stop lug 104a atits 55 lower end adapted to engage and operate a line-locking member.rl`he line-locking member comprises a sheet metal latch lever or pivotedplate 112 having its flat body part underlying bracket 65 and held flatagainst 60 the bottom face of said bracket by the annular upwardlyfacing seat or shoulder 67b on bushing 67, said plate having a slot 106therein extending rearward from the forward edge of said plate androunded at its rear o end so that the rear end and rear portions of thesidewalls of the slot hug the periphery of the hub section 67Av of thebushing. Slot 106 thus forms a pivotal bearing aperture in the plateadapted to receive hub 67? and open at one side .so that the plate maybe slipped edgewise on and off its pivot.

Plate 112 is formed with a rearwardly facing notch 107 in its rear end,downwardly into which projects the thickened head of the right handfastening screw 103-for plate 101, said screw head being of lessdiameter than the width of the notch 107 at the point where said screwhead extends into the notch. The left hand wall of notch 107 forms astop face normally held engaged with the head of screw 103 by coilspring 108, with the stop face formed by the opposite wall of said notchspaced from said screw head. Spring 108 in the present construction isconnected at 1 itsrear with the outer end of an integral arm 109extending toward the right from the rear end of the plate 112 tov apoint adjacent bracket arm 68, while the forward end of the spring isconnected' to an arm of the ribbon guide vibrating bell crank,hereinafter described,`to yieldably hold both of the members in normalposition. Spring 108 not only normally holds plate 112. rocked towardthe right, but also exerts a constant forward pull onsaid plate toprevent accifdlertal detachment of the plate from its pivot Arm 109 isoffset upward intermediate its ends in rear of plate 101 and formed witha stop lug 110 projecting .rearward therefrom and having a straightrearwardly extending ri ht hand vedge normally in the path of travel cfgstop lug 104n of margin stop 104. Plate 112 is formed with a latch arm111 offset downward therefrom and normally extending rearward and to theleft from the left hand edge of plate 112 and clearing the relativelythin head of fastening screw 102 of plate 101.

Arm 111 is normally located in rear of the lrecess or throat of therearwardly facing hook llug 90 on dog rocker arm 90 and is adapted toswing into said recess when plate 112 is rocked toward the left againstthe pull of s ring 108 (until arrested by` engagement of the right handedge of notch 107 with the head of screw 103) through the engagementwith lug 110 on member 112 of lug 1048L of margin stop 104 as thecarriage-is fed toward the left. When this occurs, the dog rocker ispositively locked in normal position so that the carriage cannot be fedfarther toward the left. Since the dog rocker cannot tilt, if acharacter key is depressed, its connected type bar 17 will simply swingu to the position where the universal bar had moved slightly rearwardand been arrested by tappet 96 striking lug 95 on the locked dog rocker.As the universal bar is thus arrested forward of its nor.' .ial rearwardlimit of travel, it blocks the completioil of the printing stroke of thetype bar and thereby prevents makin of suplrimposed im resslons upon thewor sheet.

e line may unlocked as in the Corona machine, by means not herein shown,and advance ofthe carriage continued luntil stop 104 strikes the fixedstop or lug 113* on plate The ribbonvibrator, or reciprocatory ribbonguide, 113 is slidably guided on the type guide 114 to vibrate up anddown in arplane parallel with theplane of the segment and the plane ofcase-shift movement of the platen. Type guide 114 is constructed andattached to wall 13 by screws as in the machine and applications beforereferred to, having a flat main body portion lying parallel with theplane of the segment and provided with a type bar guiding throat 115 atits upper end and a longitudinal slot 116 extending upward from itslower edge. Ribbon guide 113 lies behind the type guide and consists ofa flat sheet metal plate provided at its upper end with ribbon guidingslots and intermediate its ends with angular guide lugs 117 embracingthe sides of the type guide, all as in the machine referred to.

' In the present construction, ribbon guide 113 is formed at its lowerend with a central pendent tongue bent rearwardly at 118, and then bentsuccessively forwardly, downwardly, and rearwardly to form a rearwardlyand downwardly facing U-shaped socket 119. The front wall of socket- 119lies immediately forward of the plane of the front face of the typeguide and in the same inclined plane as the inwardly bent forward endsVof lugs 117 and is formed with lateral guide lugs 120 lying in theplane of said front wall and overlapping the front face of the typeguide at op osite sides of slot 116.

ocket portion 119 of the ribbon guide slidably works in slot 116 toassist lugs 117 to hold the ribbon guide against lateral tilting, whilelugs 117 and 120 on the one-hand, and the flat main body of the ribbonguide on the other hand, work` againstV opposite faces of the inclinediiat body part-of the type guide to maintain the ribbon guide in theplane of the segment during vibratory movement thereof.

.A bichrome inked ribbon 121 is reeled on the ribbon spools 122 andthreaded through guide slots in vibrator 113. The spools and their pawland ratchet rotating devices are mounted on brackets 123 held tocarriage bed 28 at opposite sides of the machine as in the Corona Fourmachine.

Ribbon vibrator 113 is reciprocated, and is also supported to shiftbodily in unison with the platen during case shifting, by a vibratoractuating bellcrank 124 pivotally mounted in a bracket 126 detachablyheld to the bottom face of the carriage bed 28 by screws 127. Bracket126 takes the place of a similarly located bracket in the Corona machineand upwardly and rearwardly inclined: lugs 128 for supporting the linegauge and printing point indicator Aof the machine, butin the presentconstruction the flat body part of the bracket is formed with a pair ofintegral pendent pivot lugs 125 for bellcrank 124 lying latwise infore-and-aft extending and transversely spaced planes and provided withbearing apertures for the shouldered pivot portion of pivot screws 129,the reducedv ly extending integral arm 132 extendin tois formed at itsfront 'edge with a.` pair ofward the type guide. Arm 132 has its ont endbent'to lie edgewse in a vertical plane and terminates in an enlargedbearing head 133 the top and bottom edges of which are rounded. Head 133is engaged in socket por-v tion 119 of the ribbon guide, therebyaffording a separable rocking connectionbetween the bellcrank and theguide. Bellcrank arm 131 is bent horizontally outward below its pivotear, and this outwardly bent arm portion isv formed at its rear edge atits outer end with an integral pendent stop lug 134 lying flatwise in atransverse plane and normally held back again'st a fixed abutment on theshift frame, namely the front edge of the lug 93 on escapement bracketarm V68 to which the front end of dog rockerreturn spring 91 isanchored. The bellcrank is yieldably held in this normal position, withthe ribbon guide lowered to retract the ribbon from in front of theimpact point on the platen, by the spring 108 hereinbefore referred to.the front end of this spring being anchored tothe horizontal portion ofbellcrank arm 131 and its rear end to the arm 109 of the pivotedline-locking member 112 before described. Stop lug 134 is bendablefore-andaft of the machine to adjust the normal fore-and-aft position ofthe pendent arm 130 of the bellcrank 124.

Bellcrank 124 is rocked in opposition to spring 108 by an actuatinglever 135 to cause the ribbon to cover the printing point. This lever isan upstanding and fore-and-aft rockable lever having a single arm, isaxially shiftable to either of three different positions relatively tothe pendent arm of the bellcrank, and has a rocking movement of the sameamplitude about its axis in each of .said positions. The axial settingof lever 135 determines the amplitude of throw of the bellcrank, whichis nil in one setting for writing stencils, short in another setting forcausing the upper (usually black) zone of the ribbon to cover theprinting point, and longer in the third setting for causing the lower(usually red) zone of the ribbon -to cover the printing oint.V

Lever 135 is stamped from sheet metal and has a yoke-like main bodyportion of U- shape in plan view, affording a broad flat contact wall138 for an actuating tappet ex-Y tending transversely ofthe machine anda lpair of forwardly extending side walls 139 and 140. Wall 138 isformed at its lower end with a ndent tail-piece 137 terminatin in rearof b'ace rod 30 of the shift frame, nected with the forward edgesoffwalls'139 and 140 by integral bendable ton ues of metal are a pair offore-and-aft benda leupstanding ta pet or contact lingers 141 and 142lying atwise in the planes of the walls 139 and 140, r ctively.

The mairelsbdy portion of the lever 135 is formed-with a pa1r of pendenttransversely spaced guiding and pivot ears 143 and 144 below walls 139and 140, respectively, lying in fore-and-aft planes and provided withcircular bearing holes 145V through which brace rod 30 passes loosely,affording a sliding and pivotal mounting for lever 135 at its lower endon the shift frame. Lever 135 is normally springretracted and supportedin upstanding position, .as hereinafter described, and is rockedforwardly by a two-armed tappet lever 146. Lever 146 is formed of sheetmetal and has its flat body portion 146 fitted between the flat lowerend of escapement wheel hub 7 8a and the e'scapement shaft key 87L andprovided with a bearing aperture 147 through which the escapement shaft79 extends and also with an integral upwardly ofset 'bearing 'ring 148encircling the upper end of hub 7 8a and connected by a web 149 with themain body part of the levers, thus affording a steady bearing for thelever for rocking about said shaft and hub in a'plane perpendicular tothe plane of movement of the case-shift frame.

An integral arm 136 extends forward from pivot ear 144 of lever 135between the lower pivoted end of said ear and finger 142 and has itsforward end bent toward the left hand side of the machine to forma shorttransversely extending bell-crank-arm blocking portion 136* spacedforward of the lower endI portion 130l of the pendent beller-ank arm 130when the lever 135 and bellcrank 124 are held retracted by their returnsprings. Portion 136'* is of such short length that it does not extendinto the path of the abutment portion 130a of bell-crank arm 130 exceptwhen the lever 135 is at that one of its three axially adjustedpositions nearest the left hand side of the machine..

Abutment portion 136* is so located that the rear side thereof isengaged by the forward edge of the lower abutment portion 130* of vbellcrank'arm 130 located below the lower-y most pin at thel instant theribbon guide reaches its position for covering the printing point on theplaten with the upper .zone of the ribbon when lever 135 is in its shortthrow imparting position. Arm 13() and lever 135 swing in oppositedirections about parallel axes on the printing strokes of the type barsand abutments 130 and 136L are so located Arelatively to the axes of thelevers carrying the same that abutment 130* will overtake and will bethrust against abutment 136"l through the thrust of linger 142 on pin176, as hereinafter described.

The body part of lever 146 is formed with a-tappet-carrying arm 150extending toward the left hand side of the machine and formed with anintegral pendent tappet 151 disposed edgewise in a fore-andaft planebehind contact wall 138 of lever 135, said tappet preferably having aforwardly projectmg rounded' vmetal bar disposed edgewise in a verticalplane and having the transverse slot 153 intermediate its ends, open atthe top and extendn parallel with the plane of shift of the shift frame,and also having'the longitudinal open-ended slots 155 and 156 at 4itsVfront and rear ends, respectively, extending parallel with the path ofmovement of the universal bar and perpendicular to the path of shift ofthe shift frame. Actuator bar 154 also formed with an integral pendentarm 157 adjacent its front end extending down between rod 30 and shaft58. Theslotted forward end 155 of ribbon actuator 154 is guided andsupported in and by the circumferentially grooved inner end 64'L ofpivot stud 64 carried bIy universal bar side arm section 51, and the sotted rear end of the rearwardly and downwardly extending actuator isguided and supported in a circumferential groove 158 in the rock shaft36 forming part of the shift torsion frame.

The slots and supports are so arranged that actuator bar 154 is movableendwise rear wardly and downwardly by the universal bar through themedium of stud 64 in a path per.

ator 154 and universal bar 49are returned to normal position by a returnspring 159connected with the actuator shaft 164 for the ribbon lspooldriving and ribbon feed reversing devices of the machine, said returnbeing assisted, except during stencil Writing, by the common returnspring 108 for the vibrator actuating bellcrank 124' and line-lockinglever 112. The ribbon feeding and reversing devices and actuating shaft164 therefor are constructed as' in the machine and applicationsreferred to and need only ybe briefly described. 'Y

The ribbon spools 122 rotate with ratchets 160 on the brackets 123 heldto the carriage bed 28, said ratchets being driven by pawls 161 pivotedon brackets 123 and connected by links 162 with upstanding rock arms 163fixed'on the actuating rock shaft 164. Shaft 164 is journaled on themain frame' and lies under wall 13, and the left hand rock arm 163 isextended downward below the shaft to provide a pendent rock arm 165connected by the return spring 159 above referred to) with a springanchor bar 166 mounted in the main frame of the machine to which thetype bar action return springs 167 are also connected. Arms 163 carrytappet hooks 168 at their upper ends for actuating the vribbonabutmentsettable trip devices 169 to throw one pawl 161 out of action and theother pawl into action by the paWl-contr'olling means of the providedwith a pendent rock arm 170 for oscillating the shaft at the typestrokes. r

Alll the foregoing parts of the ribbon feeding and reversing means areconstructed as in the Corona Four machine and the applica-' r ribbonactuator 154, said link 171 extending under one of the reduced trunnionportions 58a of rock shaft 58 and lying substantially at the level ofthe base line of the main frame.

Spring 159 normally rocks shaft 164 in a direction to cause link 171 todraw actuator bar 154 forward, and said bar, through engagement of therear end of slot 155 with part v64a of stud 64, normally pushes theuniversal 'bar 49 forward until return movement of these parts isarrested by the abutment of the' fronti edge of the arcuate universalbar 49 with the front wall of recess 15 in type bar segment 14. Sincetappet lever 146 is'interlocked with actuator 154 its normal position isalso fixed by this arrest of the universal ba'r. The normal returnposition of bell crank actuating lever 135 is also determined by thisarrest of the universal bar through abutment of Wall 138 of the leverwith tappet 151 on tappet lever 146. The

Corona machine not herein shown.` About midway its ends rock shaft 164is segment thus serves as a stop to'determine the normal position of-thebell-crank-actu-- ating parts of the ribbon mechanism. The normalposition of bell-crank 124 is d eterminedl by stops 134and 93. v

stencilling, Aor to reconnect it with the bell crank'at another point.The lever is guidedf'lfi byrod 30 and tappet 151 during axial slidlngad] ustment thereof, and in order to hold the lever back against thetappet a light spring 172 is provided. In the construction shown, sprin172 is connected at one end with an eye 1 .3 punched rearward from tailpiecel 137 of lever-135 and extends upward andrearwardv therefrom to thetransverse body part of dog rocker 74 to which its upper end islattached by passing its upper hooked end about the web of metal betweenthe rear edge of the rocker and one of the-stop eyes 174 punched 'downfrom the rocker with whlch the pair of pivoted spring-connected feed-dogcontrollers of the Corona machine.

cooperate.:n

Spring-172-is preferably of light tension, only strong enough 'tohold upthe lever 135 against the tappet and -to return this lever, alone, whenthe keys are actuated. Spring 172 is only very slightly stretched on'the down strokes of the keys until tappet 96 picks up theA dog rocker,after which the lever 135 and dog rockerv 74- swing together in the samedirection without appreciable tensioning of the spring during theremaining part of the down strokes of the keys. This arrangement,together with the light normal tension of the spring, provides in asimple Way for the before described sustaining of lever 135 and returnthereof without adding an appreciable load to the ribbon vibrating meansduring operation of the machine.

The pendent arm 130 of vibrator actuating bellcrank 124'has rigidlyattached thereto, above abutment portion 130l two laterally projectingshort pinsvor studs 175 and 176 located different distances from thevpivotal axis of the bell crank and at different sides of arm 130, saidpins having reduced portions passed through holes in arm 130 and headedover against the arm. The U-shaped 175 when lever 135 is shifted towardthe right from its neutral or stenciling adjustment position, and finger142 is moved directl in rear of pin 176 when lever 135 is shifte towardthe left from neutral position. Fingers 141 and 142 preferably havestraight pin-pushing front edge portions 17 7 and 178 and extendingupwardly in the same direction, and said fingers and their coactive pins175 and 176 are preferabl located different distances from the axis olever 135 and the axis of bellcrank 124, as shown, so that when pin 175is en raged with finger 141 the effective length o? lever 135 isincreased and the effective length of bellcrank arm 130 is decreased,whereas, when linger 142 is engaged with pin 17 6, the effective lengthof lever 135 is decreased and the effective length of arm 130 isincreased, thus affording a compact arrangement for imparting vthe longand short throws of necessary extent to the vi- A brator bellcrank froman actuating leve'r having a short throw of constant amplitude impartedby a type-bar-actuated universal bar which,in the machine shown, as isusual, is only moved by the type bars during the latter portion of theprinting strokes of the type bars.

The edge portions 177 and 178 of fingers 141 and 142 are madesufficiently Along to maintain contact between each of said edgeportions and its cooperating pinduring the full rearward stroke of theuniversal bar and to permit such adjustment of the fingers 141 and 142and bendable obstructing portion 136a of arm 136 as may be necessary togive proper amplitudes of movement to the vibrator for using the twozones of the ribbon.

Portion 136 of arm 136 is bendable fore-andaft of the machine to varyits normal distance forward of the lower end of the pendent arm ofbellcrank 124.

When the lever 135 is adjusted for the short throw of the vibrator thelower end portion 130a of bellcrank arm 130 engages behind portion 136of arm 136 on lever 135 at a point below pin 176 and its actuatingtappet or push fin er 142 as the type reaches the platen, thus a Ordinga cramping interlock between the bellcrank and its actuating lever whichwill prevent overthrow of the ribbon guide which might otherwise resultfrom acquired momentum of any or all of the parts of the ribbonvibrating train.

The adjustment of lever 135 to its position for effecting the long throwof the ribbon guide withdraws blocking portion 136'laterally from thepath of movement of abutment portion 130a of pendent arm 1,30 ofbellcrank, 124. In order to prevent overthrow of the ribbon guide whilelever 135 is set for the long throw, an overthrow preventing stop deviceis provided which is effective only during such adjustment of the lever.This` latter overthrow preventing `not move far enough to strike bracket126,

but said lug is adjusted so as to strike the bottom face of the bracketadjacent the forward edge of the bracket (as shown in Fig. 11) on thelong throw of the vibrator as the type reaches the platen.

The color shift and stencil control means for axially adjusting lever135 to` vary the amplitude of throw of the vibrator 113 for usingdifferent zones of the ribbon, and tog' Y render the vibrator inactivevfor writin g stencils, extends to the left hand side of the keyboard ofthe machine for convenient operation. The key lever guide comb 22 isformed at its ends with attachment lugs 180 abutting the inner faces ofside walls 12 of the main frame and held thereto b pairs of screws 181passed inward through t e walls and threaded throughthe lugs. The innerends of fastening screws 181 for lug 180 at the left hand end of thecomb are also threaded through the rearward extending arm 182l of. anupy right sheet metal bracket 182 to detachab hold said bracket to theleft hand frame wall i provided with a central locking notch 1844 'andtwo endA locking notches 185 and 186 which notches are adapted toreceive the handle arm 187 of a sheet metal bell-crank hand lever. Leverarm 187 is spring tempered and normally bowed toward the right, toautomatically spring into the locking notches, and extends up throughslot 183A, being provided at its upper end with a finger piece 188 forrocking the lever and for flexing it toward the left out of the lockingnotches.

This hand lever is* pivotally held to the lower end of bracket 182 at apoint forward of the comb 22 by a transverse pivot screw 189, and has anarm 190 extending rearward through comb notch 22 and then upward a shortdistance behind the comb. A sheet held in slots in the forward ends of apair of fore-andlaft adjustable sheet metal bars 193 clamped to arms 43,extending forward under wall 13 from brackets 43, by pairs of clampingrscrews 194 which pass through longitudinal slots in bars 193 and arethreaded into the bracket arms 43, for adjusting the tension of the typebar action return springs 167.

In the present construction, the rearmost one of the pair of screws 194at the left hand side of the machine is shouldered between vits head andthe inner face of the adjacent bar 193 (see Fig. 8), and bar 191 isprovided with an open ended longitudinal slot 195 in its rear endthrough which said shouldered portion of the screw extends to slidablysupport and guide the rear end of the bar 191 which is confined betweenthe screw head and inner face of bar 193, said slot 195 extendingrearward and downward so that bar 191 (guided by said slot and theupward and rearward extending arm 190 of the hand lever 187) will moveobliquely substantially perpendicular to the plane of the shift framewhen the hand lever is rocked.

In rear of sub-lever segment 24, arm 191 is formed with an integra-lupstandingfmger 196, bendable fore-and-aft for adjustment purposes, towhich is pivotally connected the forward end of a rigid wire link 197which extends rearward and downward under wall 13 to a point adjacentthe lower end of the left hand shift frame member 29 where it ispivotally connected with the outwardly extending arm 198 of a sheetmetal bellcrank lever 199 pivoted on said shift frame member. As shownin Fig. 1 the link 197 is so arranged that its rear end will move, whenthe shift frame is shifted from one case position to the other, betweenpoints located equal distances below and above an oblique planeperpendicular to the plane of shift of the shift frame and passingthrough the point of connection of the forward end of the link withfinger 196, so that the action of the hand lever on the bell crank 199will be the same in either case position of the shift frame and theadjustment of lever 135 will not be disturbed by case shift movements ofthe shift frame.

In the Corona-machine previously referred to, the upper case stop screws44 are carried by the outer ends of a pair of sheet metal bars 200 eachfastened by two screws 201 to the under faces of lugs 202 stampedforward out of the main transverse body p01'- tions of the shift framemembers 29. said lugs lying flatwise in a plane perpendicular to theplane of movement of the shift frame. In the present construction, asimple and efficient mounting for bellcrank 199 on the shift frame isafforded by substituting a long shouldered pivot screw (indicated at2013) for the outermost one of the pair of fastening screws for the lefthand stop carrying bar 200, the long bearing -or shoulder portion of thescrew 201 depending below bar 200 and lug 202 parallel with the path ofshift of the shift frame, and by forming the middle portion of bellcrank199 with two superposed pivot ears 203 through which said bearingportion of screw 201 extends, the lower ear resting on the head of thescrew and the upper ear engaging under bar 200.

To the right of pivot ears 203, bellcrank 199 is provided with an arm204 extending rearward through the aperture 205 in shift frame member29, afforded by the stamping out of lug 202, and connected in rear ofmember 29 with lug 46 on the adjacent rock arm 35 of the shift torsionframe by a coil spring 206 which normally draws said arm toward the leftuntil arrested by engagement of a stop lu 207 on said arm with the frontface of memer 29. A rigid wire link 208 connects the rear end of arm 204of bellcrank 199 with the tail piece 137 of the axially adjustableactuating lever 135 for the ribbon vibrator operating bellcrank 124.

Link 208 is permanently bendable to vary its length for proper axialpositioning of lever 135. Stop lug 207 is bendable oreand-aft forpurposes of adjustment and engages member 29 to prevent spring 206 fromrocking bellcrank 199 far enough to cause the left hand side of lever135 to bind or rub on the adjacent sectional side arm of the universalbar when the vibrating mechanism is set for the short throw of theribbon vibrator. Spring 206 constantly tends to take up any slack in theoperating train for adjusting lever 135, so that the lever will beyieldably maintained in the desired one of its axially adjustedpositions, when the link 208 is once adjusted to proper length,notwithstanding the fact that there is or may be a certain amount oflost motion in the lever adjusting train.

The operation of the ribbon mechanism is as follows:

When the handle arm of the adjusting lever 187 is pulled forward andengaged in notch 185 of bracket 182, bellcrank 199 is rocked to theposition shown in Figs. 1 and 9 with stop 207 engaging bracket 29, andlever 135 is drawn toward the left and held at the limit of its axialmovement in that direction by link 208. In this position of lever 135,pin 176 projects across the front edge 178 of finger 142 immediately infront of said finger while pin 175 is withdrawn laterally from in frontof forward edge 177 of linger 141 of the lever. On the down stroke ofthe character key on any one of the character key levers 19, the lug 17'on the type bar 17 actuated by said key lever engages with the forwardedge of universal bar 49 during the last part of the printing stroke ofthel type bar and pushes the universal bar rearwardly,- the parts movingfrom the position thereof shown in Fi s. 9, 13, 14,l

15, 16'and 17 to that shown in igs. 10 and 18 with the upper (usuallyblack) zone of the ribbon interposed between the printing point on tleplaten and the type at the moment of the type im act.

The parts are move toandl positively arrested in this last position asfollows: Extension 64a of the pivot stud which connects the right handside arm 51 of the universal bar with rock arms A57 pushes rearwardlythe reciprocable actuator `154 through engagement of the stud with therear end of slot 155 in the actuator. Actuator 154 rocks tappet lever'146 to swing tappet-151 forward through the engagement of arm .152 ofthe lever in slot 153 of the actuator; tappet 151 rocks lever 135forward; finger 142 pushes forward on pin 176 to rock bellcrank arm 130forward; and bellcrank arm 132 moves ribbon guide 113 upward until allparts of this type-bar actuated train are arrested at the end of thetype bar stroke by the lower end portion 130 of bellcrank' arm 130being` thrust forward against abutment portion -136ab of arm 136 oflever 135.

Abutment portions 1308L and 136* of the bellcrank and its actuatinglever come into engagement only at the end of the type bar stroke atwhich time the upper zone ofthe ribbon is interposed between -the typeand platen and such engagement together with the bellcrank swingingengagement of finger 142 and pin 176 causes arm 130 and lever 135, whichare moving in opposite directions about two parallel axes to becomeinterlocked in such a way that continued movement of either isimpossible, each lever taking a cramping grip on the other whichpreventsoverthrow of the ribbon guide which is positively connected with thebellcrank arm 132. It will be seen from Figs. 10 and 18 that stop 179 onthe bellcrank 124 does not move far enough to engage bracket 126 on theshort throw of the ribbon guide.

On the rearward stroke of the universal bar -the escapement dog rockeris actuated as herearms 163 to turn the spool on which the ribp bon isbeing reeled. This rocking of shaft V164 swings arm 165 rearward andstretches return spring 159.

On the up stroke of the actuated character key, the several type baractuated parts of the ribbon mechanism are returned to normal positionby theaction of springs 159 and108,

assisted somewhat by spring 172 and dog rocker return spring 91,thenormal position p abutment of universal bar 49 against the front wallof recess 15 in segment 14. The

bellcrank and ribbon guide are returned by spring 108 to a normalposition determined by the engagement of stops 134 and 93, said springnormally yieldably holding the bellcrank and its pins in a predeterminedposition relatively to lever 135 so that fingers 141 and 142 on lever135 may be alternately shifted into operative position behind'theircoacting pins, or lboth positioned out of line with their coacting pins,by axial shifting of the lever 135 which is guided to slide in apredetermined normal plane by rod 30 and the sliding engagement betweenflat trans` verse wall 136 of the lever 135 and the nose of tappet 151on lever 146.

To set the vibrating mechanism for the long throw of the guide to usethe lower (usually red) zone of the ribbon, hand lever 187 is rocked tothe opposite limit of its throw It will be observed that this newconnected relation of lever 135 and arm 130 of bellcrank 124 withdrawsabutment 136a on lever 135 from the path of part 130* of the bellcrank124 and also changes the leverage by establishing a motion-transmittingconnection between said lever and bellcrank-and farther from the axis 30of the lever than that established by the previously described settingfor the'short throw. The increase in effective length of actuator lever135 and I decrease in effective length of the actuated bellcrank arm 130is such that the guide is given a substantially greater throw from lever135 in the new setting although lever 135 swings through the same arc onthe printing stroke of a type bar.

vThe augmented throw of the bellcrank is such that bellcrank abutment130 swings ast the laterally shifted actuating lever abutment 136abefore the type bar completes its printing stroke. At the instantA oftype impact, as shown in Fig. 11, however, the ribbon vibrating train isarrested by stop lug 179 on the bellcrank striking the fixed stop formedby the under face of bracket 126.

nected with the bellcrank, overthrow of the guide is prevented by thisengagement of stops 179 and 126.

To render the guide inactive during mak- 'ing of stencils, lever 187 isshifted to its intermediate position and engaged in locking notch 18.4as shown inFig. 8 to slide lever 135 axially to its intermediate axiallyadjusted position, as shown in Fig. 7, wherein both pins are displacedfrom in front of their actuating fingers on level 135. On the printingstrokes, of the type bars, with levers 135 adjusted as just described,all the ribbon actuating devices except bellcrank 124 and guide 113 moveas before described, lever 135 swinging forward until the type barcompletes its printing stroke. It will be observed from Figs. 7 and 12that lingers 141 and 142 and walls 139 and 140 move forwardly at eitherside of the outer ends of the pins 175 and 176, and that lever 135 isnot Y moved far enough by the universal bar for wall 138 of said lever,to engage and rock Vthe pendent arm 130 of the vbellcrank, so

that the bellcrank and ribbon guide 113 remain in normal retractedposition and the actuated type strike the platen at the printing pointover the upper edge of the rib-bon.

What I claim is:

1. In a ribbon vibrating mechanism for printing machines, thecombination of a ribbon guide, and means for vibrating said guide tocause a ribbon to cover and uncover a printing point, said mea-nscomprising two members swinging in diferent directions about differentparallel axes, one of said members being movable by the other to aposition in which the guide is positioned to cover the printing pointwith a ribbon and each member has two opposed contacts with the othermember at two points at one side of its axis located different distancesfrom its axis.

2. In a ribbon vibrator mechanism for typewriting machines, thecombination of an actuated lever and an actuating lever therefor; havingparallel pivotal axes, a ribbon guide positively connected with theactuated lever, and means for oscillating the actuating lever at thetype strokes, one of said levers having two oppositely facing portions,located different distances from its axis, first one and then both ofwhich are engaged with the other lever, upon movement of the aetuatinglever in the' direction transmitting print-ing point covering movementto the actuated lever, for first moving the guide to covering positionand then arresting movement of the guide to prevent overthrow of theguide.

3. In a ribbon vibrating mechanism for typewriting machines, thecombination of a ribbon guide, a guide vibrating lever positivelyconnected with the guide, an actua-ting lever for said guide. vibratinglever rockable about an axis parallel with the axis of said guidevibrating lever and slidable lonitudinally of its axis between twopositions 1n which it is operative on said guide vibrating lever toimpart Athereto throws of different amplitude, means rigidly held tosaid actuating lever engageable by the guide vibrating lever, only uponthe guide reaching covering position and only when said actuating leveris axially adjusted to its position for imparting the shorter throw tothe guide vibrating lever, for arresting movement of the guide vibratinglever, and stationary means engageable by the guide vibrating lever onlyat the end of its longer throw to arrest movement thereof when theactuating lever is axially adjusted to its position for imparting thelong throw to the guide vibrating levers.

4. In a typewriting machine, the combination of a platen, key-operatedtypes, a ribbon guide normally retracted from the printing point on theplaten, a bellcrank having a forwardly extending arm directly andpositively connected with the ribbon guide for vibrating the guide upand down and a pendent arm provided with two transverse projections atopposite sides thereof different distances from the axis of thebellcra-nk, an upstanding actuating lever for the bellcrank rockablefore-and-at and slidablctransversely about an axis parallel with theaxis of the bellcrank, a pair of transversely spaced tappets lon saidupstanding lever cooperative one at a time with different ones of saidprojections on the pendent Ibellera-nk arm. manually adjustable meansfor sliding said upstanding lever axially between two bellcrankactuating positions in each of which a different ta-ppet is positionedin rear of its cooperative projection to set the lever for impartingcovering throws of different amplitude to the guide, universal baractuated means for rocking said upstanding lever to move the guideupwardly to cover the printing point with a bichrome ribbon ou 'theprinting strokes of the types, an abutment on the upstanding leverlocated in the path of the forward movement of the pendent hellcrank armonly Iwhen the lever is positioned for engagement of one of its ta ppetswith that projection on the pendent bellcrankarm located farthest fromthe axis of the bellcrank, said abutment being nearer to the axis of theupstanding lever than to the axis of the bellcrank and engageable b vthe pendent arm of the bellcrank after a predetermined forward movementof said arm to positively arrest upward movement of the guide inposition for cove-ring the printing point with the upper zone of albichrome ribbon, and a fixed abutment engageable by the bellcrank. whenthe same is rocked a predetermined greater distance by the other tappetand piu, to positively arrest upward movement .of the guide in positionfor covering the printing point with the lower zone of the ribbon.

5. In a typewriting machine, the combination of a platen, key-operatedtypes, a' ribbon guide normally retracted from the printing point on theplaten, a bellcrank having a forwardly extending arm directly andpositively connected with the ribbon guide for vibrating the guide upand down and a pendent arm provided with two transverse projections atopposite sides thereof different distances from the axis of thebellcrank,q an upstanding actuating lever for the bellcrank rockablefore-and-'aft and slidable transversely about an axis parallel with theaxis of the bellcrank, a pair of transversely spaced tappets on saidupstanding lever cooperative one at a time with' different ones of saidprojections on the pendent bellcrank arm, manually adjustable means forsliding said upstanding lever axially between two bellcrank actuatingpositions in each of which a different tappet is positioned in rear ofits cooperative projection to set the lever for imparting coveringthrows of different amplitude to the guide, universal bar actuated meansfor rocking said upstanding lever to move the guide upwardly to coverthe printing point with a bichrome ribbon on the printing strokes of thetypes, and two overthrow preventing abutments engageable bythe'bellcrank after different extents of throw thereof by the upstandinglever, one of said abutments being fixed relatively to the bellcrankandlever and engageable by the bellcrank only on the long throw thereof,and the other abutment being movable bodily transversely andfore-and-aft with the upstanding lever and in the path of and engageableby the bellcrank only on the short throw of the bellcrank. l

6. In a typewriting machine, the combination of a platen, key-operatedtypes, a reciprocatory ribbon guide for a bichrome ribbon normallyretracted downward to withdraw the ribbon from in front of the printingpoint on the platen, a bellcrank swinging about a transverse axis andhaving a forwardly extending arm directly and positively connected withthe guide and a pendent arm, an upstanding actuating lever pivotally andslidably supported to swing fore-and-aft and slide transversely, a pairof tappets on said upstanding lever for transmitting forward movement tothe pendent arm of the bellcrank at either of two points differentdistances from the bellcrank axis, manually adjustable means for`sliding the upstanding lever transversely to either of three positionsin two of which different ones of said tappets are cooperative with thependent arm of the bellcrank and in the third of which neither of said'tappets 'is positioned for transmitting movement to said bellcrankcrank arm by transverse sliding adjustment of the upstanding lever toits position for rendering the long throw tappet effective on saidbellcrank arm, and a fixed stop constantly in the path of the bellcrankagainst which tbe bellcrank is thrust bythe long throw tappet upon theguide reaching its long throw covering position.

7. In a typewriting machine, the combination of a platen carriage, aplaten on the carriage, a main frame, key-operated type bars on the mainframe, case-shift means including a shift frame for the carriage movableup and down relatively to the main frame, a reciprocatory guide for abichrome ribbon normally retracted downward for withdrawing` the ribbonfrom in front of the printing point, a bellcrank pivoted on the shiftframe to swing about a transverse axis and having a forwardly extendingarm directly and positively connected with the ribbon guide and apendent arm, an upstanding lever pivotally and slidably supported on theshift frame to rock fore/and aft andslide transversely, a pair oftappets on said upstanding lever for transmitting forward movements tothe pendent bellcrank arm at either of two points different distancesfrom the crank axis, a pair of stationary stops on the shift frameengageable bythe bellcrank to determine its normalidle position and its`maximum guide-liftingposition respective- -ly, a stop on the upstandinglever engageable bythe bellcrank for determining the limit of the shortthrow guide-lifting movement of the bellcrank, manually operable meansfor sliding said upstanding lever transversely between two positions linwhich different ones of said tappets are effective on the pendentbelicrank arm, said stop on the upstanding lever being movable therewithinto the path of the bellcrank when the lever is adjusted for renderingthe short throw tappet effective and being movable out of the path ofthe bellcrank when theV lever is adjusted to render the long throwtappet effective, and universal bar actuated means for rocking' theupstanding lever forwardly uniformly in the different case positions ofthe shift frame on the printing strokes of the type bars.

8. In a typewriting machine, the combination of a platen carriage, aplaten on the and havinrg a forwardly extending arm directly Y anpositively connectedv with the ribbon guide and a pendent arm, anupstanding lever pivotally and slidably supported on the' shift frame torock fore-andaft and slide transversel a pair of tappets on saidupstanding lever or transmittlng forward movement to the pendentbellcrank arm at either of two points different distances from thebellcrank axis, a pair of stationary stops on the shift frame engageableby the bellcrank to determine its normal idle position and its maximumguide-lifting position respectively, a stop on the upstanding leverengageable by the bellcrank for determining the llmit of the short throwguide-lifting movement of the bellcrank, manually operable meansforsliding said upstanding lever transversely between two positions inwhich different ones of said tappets are effective on the pendentbellcrank arm, said stop on the upstanding lever being movable therewithinto the path of the bellcrank when the lever is adjusted for renderingthe short throw tappet effective and being movable out of the path ofthe bellerank when the lever is adjusted to render the long throw tappeteffective, a transversely extending lever mounted on the shift frame toswing about an lip-and-down extending axis and having an arm engagedbehind said upstanding lever in the different slidably adjustedpositions thereof and an arm by which it is rocked, a fore-and-aftreciprocable actuator mounted on the main frame having a slot perendicular to the path of shift of the shi t frame through which saidlast-mentioned arm of the transversely extending lever extends, and atype-bar-actuated universalbarmounted on the main frame connected withsaid actuator to move the actuator rearwardly on the printing strokes ofthe type bars.

9. In a typewritingmachine, the combination of a platen carriage, aplaten on the carriage, a main frame, key-operated type bars on the mainframe, case shift means including an up and down movable shift frame forthe carriage, a reciprocatory guide for a blchrome rlbbon normallyretracted downward to withdraw the ribbon from in front fore-and-aft andslide transversely, a belll crank pivoted on the shift frame to swinabout an up and down extending axis an having a fore-and-aftextending'arm and a transversely extending arm, a transverse linkconnecting said fore-and-aftvextendin arm of the last-mentionedbellcrank with said upstanding lever, a fore-and-aft extending linkconnected at its rear end with said transversely extending arm of thelast-mentioned bellcrank, manually operable means on the main framereciproeable fore-and-aft and connected with the forward end of saidforeand-aft extendinglink for adjusting standing lever transversely, apair 0 tappets carried by said upstanding lever effective to transmitforward movement to the pendent arm of the guid actuating bellcrank indifferent slidably adjusted positions of the lever at two pointsdifferent distances from the axis of the bellcrankba stop on the shiftframe for limiting rearward movement of the pendent the Vuparm of thebellcrank, universal bar actuated tappet means for rockingsaidupstanding lever forward and adapted to arrest rearward movementthereof and cooperate with the pivotal mounting of the lever to guidesaid lever during sliding adjustments thereof for movement of said levertappets into and out of operative relation with the pendentbell-crank-arm, a spring connected with said upstanding lever to urffethe same rearward, a stop on said u'pstandinglever located forengagement therebehind of the pendent beller-ank arm after apredetermined movement of the bellcrank by the short throw tappet onsaid lever and withdrawn from the path of said arm by a slidingadjustment of the lever rendering the long throw tappet effective, andcooperating stops on the bellerank and shift frame engageable only whenthe bellcrank is rocked by the long l movable up and down, a tappetmounted on the shift frame to swing in a plane perpendicular to the pathof case shifting movement of the shift frame, fore and aft reciprocablekey-operated means on the main frame directly engaged wlth said tappetfor swinging the same in all case positions of the shift frame, a

ribbon guide, a bellcrank pivoted on a transforwardl extendin Anected'with the gui e and a pendent arm,

a lever on the shift frame rockable about an axis below the bellcrankaxis and engaged by said tappet and having an upstanding arm adjacentthe pendent arm of the bellcrank verse axis lon the shift frame andhaving a connected lever toipositively limit the extent arm positivelyconof upward throw of the guide.

- Intestimony whereof I hereunto aix my-l signature.

for pushing the pendent arm forwardly, and

a stop on said upstanding arm normally spaced forwardl from the pendentarm and against which-t e 'pendent arm strikes at a diferent distance'from its axis than the oint of forward thrust thereagainst as the r1 bonguide reaches printing point covering position. v 12. In a typewritingmachine, thcombination of a main frame, a platen shift frame movable upand down', a tappet mounted on the shift frame to swing in a laneperpendicular to -the ath of case' shi ing movement of the shiftkey-operated means o'n the main frame directly engaged with said tappetfor swinging the same in all case sitionsof the shift frame,

Ya.. ribbon guide, a ellcrank pivoted on a transverse axls on the shiftframe and having a forwardl extendin arm positively connected w1th thegui e and a ndent arm, a

lever on the shift frame roc able about an .A an u standing arm adjacentthe ni arm for pushing the pen ent arm for wardly means for axiallyadjusting the lever A to estab axis parallel with land below th'ebellcrank axis and engaged by said tappet andhaving ndent bellcra lisheither of two forwar connections with the pendent arm, one o whichconnections is closer to the bellcrank axis than the other to increasethe upward throw of the guide, a stop on said upstandingas the ri bonguide reaches lower printing point covering position; and a fixed sto onthe shift frame always in the path of the llcrank and engageable therebonly when ame, fore and aft reciprocable pushin A the lever is adjustedfor the onger throw A vof the guide. 13. In a typewriting machine, thecombination of a main frame, a platen shift frame, a key-operated tappeton the shift frame, a ribbon guide, and a pair of directly coactivemotion-transmitting levers pivoted on transverse axes on the shift frameand interposed between the tappet and guide, one of said levers beinpositively connected with the guide and t e otherv being directlyactuated y the tappet and having means for first exerting a guidelifting thrust` on the guide connected Alever and then opposing to suchuide lifting thrust a counter thrust at a iiferent distance from theaxis of the guide HERY ALLEN AVERY.

